Lubricant



Patented Nov. 19, 1940 UNITED STATES ""'PATE-NT OFFICE 2,222,487 LUBRICANT Johan C. D. Oosterhout and William S. Quimby,

Port Arthur, Tex, assignors to The Texas Company, New York, N. Y., a corporation of Delaware No Drawing. Application September 29, 1937,

Serial No. 166,326

3 Claims.

stantial quantities in soybeans.) Commercial grades of lecithin known by the trade names Lipoidol, Coloidol H X" and Coloidol B T have been found satisfactory. The amount of phosphatide used ranges from A tov3%, and preferably about 1%.

Also we prefer to incorporate in the lubricating oil a small amount of a fatty oil, such as an animal oil, for example lard oil. The amount of fatty oil used may range from 2 to an preferably about 5%.

In order to impart to the composition a pleasant odor, a small amount, for example about 0.06%, of an organic odorant or perfume, such as citronella may be added.

. An improved composition which we have found to be particularly suitable comprises:

I Per cent Refined lubricating oil 100 Saybolt Universal viscosity at 100' F. 94 Prime lard oil 5 Lecithin 1 The above product tested as follows: I Gravity A. P. I 3'1. 6 Flash, Cleveland open cup 375 Fire, Cleveland open cup F 420 Viscosity Saybolt Universal 100 F 101,

Color, 6" cell 55 Pour F 25 Neutralization number 0. 08 Iodine number..

Saponification number--..-..' 9 1 sligh oxidation number 31. 6 Evaporation per cent 8 Rust proofing cellent Stain test-discoloration None (Such phosphatide compounds occur naturally in sub- 1 The evaporation test was made according to the California State chemists method of evaporation in which one gram of oil is evaporated for a definite period at 212 F. from a mixture of the oil and 9 grams of sand.

. The staining test was a modified method of the National Association of Hosiery and Underwear Manufacturers, in which the oil was poured on a cotton oilyfabric and exposed to .a weatherometer lamp for a definite period, washing the oily fabric with a soap or soda ash, dyeing the fabric and measuringthe discoloration thereof. The rust-proofing test consistedin dipping thin iron strips in oil, draining 18 to 24 hours at atmospheric temperature and then spraying with distilled water twice a day, at least 4 hours apart. I l 1 The lubricating oil composition herein described is -a high grade household lubricant having improved properties with respect to stability, oiiiness, staining and rust-proofing qualities.

Obviously many modifications and variations of the invention, as hereinbefore set forth, may

- be made without departing from the spirit and scope thereof and therefore only such limitations should be imposed as are indicated in the appended claims. v y

We claim:

1. A- lubricant of the character described having superior rust-proofing properties consistin essentially of a light petroleum lubricating oil having a Saybolt viscosity at 100 F. of 60-150, about 240% of a fatty oil, and about 0.5-3.0%

. of a phosphatide.

2. A household lubricant having superior rustproofing properties consisting essentially of a light petroleum lubricating oil havinga Saybolt viscosity at 100 F. of 60-150, about 240% of lard oil about 0.543% of a phosphatide, and a f 

